... , PDB,and EPUB 7 inch E-Book(Touch Screen) Product Readme Display: Display type: Touch Screen Digital LCD Resolution: 800 x 480 pixels Size ... type): built-in Lithium polymer (2,800mAh) Mode of operation: Touch screen keypad E-book: ANSI, Unicode TXT, Doc, PDF, HTML, FB2 ... , 5, 10, 15, and 20mins Screen refresh: full screen refresh and partial refresh With calendar and G-sensor USB port: USB 2.0